Search for single b*-quark production with the ATLAS detector at root s=7 TeV


Aad G., Abajyan T., Abbott B., Abdallah J., Khalek S. A. , Abdelalim A. A. , ...More

PHYSICS LETTERS B, vol.721, pp.171-189, 2013 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 721
  • Publication Date: 2013
  • Doi Number: 10.1016/j.physletb.2013.03.016
  • Title of Journal : PHYSICS LETTERS B
  • Page Numbers: pp.171-189

Abstract

The results of a search for an excited bottom-quark b* in pp collisions at root s = 7 TeV, using 4.7 fb(-1) of data collected by the ATLAS detector at the LHC are presented. In the model studied, a single b*-quark is produced through a chromomagnetic interaction and subsequently decays to a W boson and a top quark. The search is performed in the dilepton and lepton + jets final states, which are combined to set limits on b*-quark couplings for a range of b*-quark masses. For a benchmark with unit size chromomagnetic and Standard Model-like electroweak b* couplings, b* quarks with masses less than 870 GeV are excluded at the 95% credibility level. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.